CN111542870B - Electronic device, luminance control method, and storage medium - Google Patents

Electronic device, luminance control method, and storage medium Download PDF

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Publication number
CN111542870B
CN111542870B CN201880083088.4A CN201880083088A CN111542870B CN 111542870 B CN111542870 B CN 111542870B CN 201880083088 A CN201880083088 A CN 201880083088A CN 111542870 B CN111542870 B CN 111542870B
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China
Prior art keywords
luminance
display
display unit
reliability
liquid crystal
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CN111542870A (en
Inventor
内田修平
野村敬一
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Casio Computer Co Ltd
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Casio Computer Co Ltd
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Priority claimed from PCT/JP2018/046176 external-priority patent/WO2019124272A1/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/163—Wearable computers, e.g. on a belt
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/02—Detectors of external physical values, e.g. temperature
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/02—Detectors of external physical values, e.g. temperature
    • G04G21/025—Detectors of external physical values, e.g. temperature for measuring physiological data
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/04—Input or output devices integrated in time-pieces using radio waves
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0017—Visual time or date indication means in which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3265—Power saving in display device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • Physiology (AREA)
  • Remote Sensing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • General Health & Medical Sciences (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

Provided is an electronic device capable of appropriately adjusting the brightness of an electronic device in which an illuminance sensor is disposed on the back side of a display unit. The electronic device includes a display unit, an illuminance sensor, a luminance control unit, and an operation determination unit. The illuminance sensor is disposed on the back side of the display surface of the display unit. The luminance control section controls the luminance of the display section based on the information on the light detected by the illuminance sensor. The operation determination section determines the reliability of the information relating to light detected by the illuminance sensor. When the reliability is determined to be high, the luminance control unit controls the luminance of the display unit. When the reliability is determined to be low, the luminance control unit suppresses the control of the luminance of the display unit.

Description

Electronic device, luminance control method, and storage medium
Technical Field
The invention relates to an electronic device, a brightness control method and a storage medium.
The following techniques are known in the past: an illuminance sensor is placed on the back side of the light irradiation surface of the display unit, and the amount of light of the display unit is adjusted based on the amount of external light detected by the illuminance sensor.
Documents of the prior art
Patent document
Patent document 1: specification of U.S. patent application publication No. 2014/0132158
Disclosure of Invention
Problems to be solved by the invention
However, in the above-described configuration, if the display unit is temporarily covered with an obstacle, the amount of external light incident on the illuminance sensor is temporarily reduced even if there is no change in the external light. In this case, the illuminance sensor may not be able to accurately detect the external light, and the luminance of the display unit may not be able to be appropriately adjusted.
The present invention has been made in view of such circumstances, and an object thereof is to provide an electronic device capable of appropriately adjusting luminance in an electronic device in which an illuminance sensor is disposed on the back side of a display unit.
Means for solving the problems
In order to achieve the above object, an electronic device according to an aspect of the present invention includes: a display unit; a light detection unit disposed on a back surface side of a display surface of the display unit; a luminance control section that controls luminance of the display section based on the information on the light detected by the light detection section; and a determination unit configured to determine reliability of information relating to light detected by the light detection unit, wherein the luminance control unit controls luminance of the display unit when the determination unit determines that the reliability is high, and the luminance control unit suppresses the control of the luminance of the display unit when the determination unit determines that the reliability is low.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide an electronic device capable of performing appropriate luminance adjustment in an electronic device in which an illuminance sensor is disposed on the back side of a display unit.
Drawings
Fig. 1 is a schematic diagram showing an electronic device according to embodiment 1 of the present invention.
Fig. 2 is a block diagram showing a hardware configuration of the electronic apparatus.
Fig. 3A is a schematic diagram showing an installation form of an illuminance sensor in a display area of an electronic device.
Fig. 3B is a schematic view showing the cross section X-X' in fig. 3A.
Fig. 4 is a functional block diagram showing a functional configuration for executing the 1 st luminance control process among the functional configurations of the electronic apparatus of fig. 2.
Fig. 5 is a flowchart illustrating a flow of the 1 st luminance control process executed by the electronic apparatus of fig. 1 having the functional configuration of fig. 4.
Fig. 6 is a functional block diagram showing a functional configuration for executing the 2 nd luminance control process among the functional configurations of the electronic apparatus of fig. 2.
Fig. 7 is a flowchart illustrating the flow of the 2 nd luminance control process executed by the electronic apparatus of fig. 1 having the functional configuration of fig. 6.
Detailed Description
An electronic device of the present invention includes a display unit, an illuminance sensor, and a luminance control unit. The illuminance sensor is disposed on the back side of the display surface of the display unit. The luminance control section controls the luminance of the display section based on the information about the light detected by the illuminance sensor and the accuracy indicating the degree of accuracy of the information about the light.
In embodiment 1, the luminance is controlled based on the illuminance detected by the illuminance sensor and the accuracy (reliability) determined according to the presence or absence of the operation of the touch panel of the display unit. For example, when the touch panel is not operated, the luminance control unit determines that the accuracy is equal to or higher than a predetermined value (i.e., determines that the reliability is high), and controls the luminance based on the illuminance detected by the illuminance sensor. On the other hand, for example, when the touch panel is operated, the luminance control unit determines that the accuracy is less than the predetermined value (i.e., determines that the reliability is low), and suppresses the control of the luminance based on the illuminance detected by the illuminance sensor. That is, when it is determined that the accuracy is less than the predetermined value (that is, when it is determined that the reliability is low), the luminance control section does not perform the control of the luminance. Alternatively, when it is determined that the accuracy is equal to or higher than the predetermined value (that is, when it is determined that the reliability is high), the luminance control unit estimates a change amount (reduction amount) of the illuminance generated by the operation of the touch panel and performs the control of the luminance in consideration of the change amount.
In embodiment 2, the luminance is controlled based on the illuminance detected by the illuminance sensor and the accuracy (reliability) determined in accordance with the state of the liquid crystal display screen. For example, when the liquid crystal display screen is in a transmissive state, it is determined that the accuracy is equal to or higher than a predetermined value (i.e., it is determined that the reliability is high), and the luminance is controlled based on the illuminance detected by the illuminance sensor. On the other hand, for example, when the liquid crystal display screen is not in the transmissive state, the luminance control unit determines that the accuracy is less than the predetermined value (i.e., determines that the reliability is low), and suppresses the control of the luminance based on the illuminance detected by the illuminance sensor. That is, when it is determined that the accuracy is less than the predetermined value (that is, when it is determined that the reliability is low), the luminance control section does not perform the luminance control. Alternatively, when it is determined that the accuracy (reliability) is equal to or higher than a predetermined value (that is, when it is determined that the reliability is high), the luminance control unit estimates a change amount (reduction amount) of the illuminance caused by the liquid crystal display screen not being in the transmission state, and performs the control of the luminance in consideration of the change amount.
As described above, the luminance control unit in each embodiment controls the luminance of the display unit when the accuracy of the information on the light detected by the illuminance sensor is equal to or higher than a predetermined value (that is, when it is determined that the reliability is high). That is, the accuracy (reliability) of the light amount or the like detected by the illuminance sensor 29 is determined, and when the accuracy (reliability) is determined to be high, the luminance of the display unit is adjusted. In addition, when the accuracy (reliability) is determined to be low, the control of the luminance of the display portion is suppressed as compared with the case where the accuracy is determined to be high. Thereby performing appropriate brightness adjustment.
Embodiments of the present invention will be described below with reference to the drawings.
[ Structure ]
Fig. 1 is a schematic diagram of an electronic device 1 according to embodiment 1 of the present invention.
As shown in fig. 1, the electronic device 1 of the present embodiment is configured as a wristwatch-type device (smart watch or the like). The electronic device 1 includes a 1 st display unit 18 and a 2 nd display unit 24 (described later), and the 2 nd display unit 24 is stacked on the 1 st display unit 18. Further, a touch panel 17 described later is provided on the 2 nd display unit 24. Therefore, in the electronic apparatus 1, the display of the 2 nd display unit 24 can be superimposed on the display of the 1 st display unit 18 to be displayed, and the display content can be touched.
Fig. 2 is a block diagram showing the hardware configuration of the electronic apparatus 1.
As shown in fig. 2, the electronic device 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a storage Unit 14, an RTC (Real Time Clock) Unit 15, a driver 16, a touch panel 17, a 1 st display Unit 18, a 1 st input Unit 19, a bluetooth (registered trademark) antenna 20, a bluetooth (registered trademark) module 21, a wireless LAN (Local Area Network) antenna 22, a wireless LAN module 23, a 2 nd display Unit 24, a pulse sensor 25, a geomagnetic sensor 26, an acceleration sensor 27, a gyro sensor 28, an illuminance sensor 29, a 2 nd input Unit 30, a GPS (Global Positioning System) antenna 31, and a GPS module 32.
The CPU11 is composed of a 1 st CPU11A and a 2 nd CPU 11B.
The 1 st CPU11A performs various arithmetic processes, and controls smartphone-like functions in the electronic apparatus 1 by executing processing of the OS. In the present embodiment, the 1 st CPU11A displays an incoming email message, a weather information message, and the like received via the bluetooth (registered trademark) module 21 or the wireless LAN module 23 on the 1 st display unit 18, or receives an input operation via the touch panel 17. In addition, the 1 st CPU11A recognizes the sound input via the 1 st input unit 19, or performs processing relating to various functions installed as functions similar to a smartphone separately.
In the present embodiment, the 1 st CPU11A acquires a time signal from the RTC section 15 at a predetermined timing.
The 2 nd CPU11B executes a process of a specific program to instruct the display unit 24 to display a display, to acquire detection results of various sensors, and to perform processes related to various functions installed as functions of a wristwatch. In the present embodiment, the 2 nd CPU11B calculates the time based on the time signal input from the 1 st CPU11A, and displays the time, day of the week, date, and the like on the 2 nd display unit 24. Since the processing (such as the calculation of the time) of the specific program executed by the 2 nd CPU11B is a simpler operation than the processing of the OS executed by the 1 st CPU11A, the processing load is small and the processing can be executed with low power consumption. In addition, it is sufficient that the specification of hardware required for the 2 nd CPU11B is lower than that of the 1 st CPU 11A.
The ROM12 can be read from the 1 st CPU11A and the 2 nd CPU11B, respectively, and the ROM12 stores various programs and initial setting data to be executed by the 1 st CPU11A and the 2 nd CPU 11B. For example, the ROM12 stores programs such as programs of the OS executed by the 1 st CPU11A, various programs executed under the management of the OS, and programs executed by the 2 nd CPU11B (in this case, embedded programs for realizing the functions of a wristwatch).
The 1 st CPU11A and the 2 nd CPU11B can read and write data from and into the RAM13, respectively, and the RAM13 provides a memory space for work to the 1 st CPU11A and the 2 nd CPU11B and stores temporary data for work. For example, the RAM13 provides a system area, a work area when the 1 st CPU11A executes an OS, or provides a storage area when the 2 nd CPU11B executes a specific program.
The storage unit 14 is a nonvolatile Memory capable of reading and writing data from and to the 1 st CPU11A and the 2 nd CPU11B, respectively, and is, for example, a nonvolatile Memory or an EEPROM (Electrically Erasable and Programmable Read Only Memory). The storage unit 14 stores various data (data of various setting contents, etc.) generated in various functions such as those of a smartphone and those of a wristwatch.
The drive 16 is appropriately provided with a removable medium 41 formed of a magnetic disk, an optical magnetic disk, a semiconductor memory, or the like. The removable medium 41 can store various data such as data detected by various sensors.
The touch panel 17 is a capacitive touch panel or a resistive touch panel provided on the display screen of the 2 nd display unit 24. The touch panel 17 detects a touch operation position and operation contents of the operation surface by the user, generates a signal in accordance with the operation, and outputs the signal as an input signal to the 1 st CPU 11A.
The 1 st display unit 18 is formed of an Organic EL display (Organic Light Emitting Diode) and displays various information on a display screen according to the control of the 1 st CPU 11A.
The 1 st input unit 19 includes a microphone for converting voice into an electric signal, and outputs a signal indicating the input voice (voice command for operation, etc.) to the 1 st CPU 11A.
The antenna 20 for bluetooth (registered trademark) is an antenna for transmitting and receiving electromagnetic waves based on the bluetooth (registered trademark) standard, and is configured by, for example, a monopole antenna or the like. The bluetooth (registered trademark) antenna 20 transmits an electric signal of wireless communication input from the bluetooth (registered trademark) module 21 as an electromagnetic wave, or converts a received electromagnetic wave into an electric signal and outputs the electric signal to the bluetooth (registered trademark) module 21.
The bluetooth (registered trademark) module 21 transmits a signal to another device via the bluetooth (registered trademark) antenna 20 in accordance with the instruction of the 1 st CPU 11A. The bluetooth (registered trademark) module 21 receives a signal transmitted from another device, and outputs information indicated by the received signal to the 1 st CPU 11A.
The wireless LAN antenna 22 is an antenna capable of receiving radio waves of a frequency corresponding to wireless communication used by the wireless LAN module 23, and is configured by, for example, a loop antenna or a rod antenna. The wireless LAN antenna 22 transmits the radio communication electric signal input from the wireless LAN module 23 as an electromagnetic wave, or converts the received electromagnetic wave into an electric signal and outputs the electric signal to the wireless LAN module 23.
The wireless LAN module 23 transmits a signal to another device via the wireless LAN antenna 22 in accordance with an instruction from the 1 st CPU 11A. The wireless LAN module 23 receives a signal transmitted from another device, and outputs information indicated by the received signal to the 1 st CPU 11A.
The 2 nd display unit 24 is formed of a PN (Polymer Network) liquid crystal display that can partially or entirely transmit light, and displays various information (segment display in this case) on the display screen according to the control of the 2 nd CPU 11B.
In the present embodiment, the PN liquid crystal display as the 2 nd display unit 24 is stacked on the display screen of the organic EL display as the 1 st display unit 18 as described above, as shown in fig. 3B. In this PN liquid crystal display, liquid crystal molecules are irregularly arranged at a portion to which no potential is applied, and light is reflected. That is, display of the PN liquid crystal display is performed at the portion to which no potential is applied. On the other hand, at the portion to which the potential is applied, since the liquid crystal molecules are aligned vertically with respect to the display screen, light can be transmitted.
That is, since the light from the organic EL display can be transmitted through the portion to which the electric potential is applied, the display of the organic EL display can be visually recognized through the PN liquid crystal display. That is, in the display area of the electronic device 1, the display of the 2 nd display unit 24 can be superimposed on the display of the 1 st display unit 18.
In this way, the function of causing the orientation/non-orientation of the liquid crystal molecules prevents the transmission of light. The structure of the PN liquid crystal display in this embodiment is referred to as a "liquid crystal shutter" because of this function. The state in which light can be reflected by the liquid crystal molecules is referred to as "the closed state of the liquid crystal shutter", and the state in which light is transmitted by the liquid crystal molecules is referred to as "the open state of the liquid crystal shutter".
The pulse sensor 25 is provided on the back side of the electronic device 1 (the side facing the arm of the user), and detects the pulse of the user wearing the electronic device 1.
The geomagnetic sensor 26 detects the direction of geomagnetism, and outputs information indicating the detected direction of geomagnetism to the 2 nd CPU 11B.
The acceleration sensor 27 detects acceleration in the 3-axis direction in the electronic apparatus 1, and outputs information indicating the detected acceleration to the 2 nd CPU 11B.
The gyro sensor 28 detects an angular velocity in the 3-axis direction in the electronic apparatus 1, and outputs information indicating the detected angular velocity to the 2 nd CPU 11B.
The illuminance sensor 29 is provided at a predetermined position on the back surface side of the 1 st display unit 18, detects brightness (illuminance) in the display area of the electronic device 1, and outputs information indicating the detected brightness to the 2 nd CPU 11B. The 1 st CPU11A executes processing (the 1 st luminance control processing and the 2 nd luminance control processing described later) for adjusting the luminance of the display screen of the 1 st display unit 18 based on the brightness detected by the illuminance sensor 29 as described later.
Fig. 3A is a schematic diagram showing an installation form of the illuminance sensor 29 in the display area of the electronic device 1. Fig. 3B is a schematic view showing a cross section X-X' in fig. 3A.
As shown in fig. 3A, the illuminance sensor 29 is provided at a given position (a lower right center position shown by a broken line in fig. 3B) in the display areas of the 1 st display unit 18 and the 2 nd display unit 24. As shown in fig. 3B, the display region of the electronic device 1 has a cross-sectional structure in which the cover glass CG, the touch panel 17, the 2 nd display unit 24, the 1 st display unit 18, the black sheet BS, and the main substrate MB are laminated in this order from the front surface side.
Among these, the black sheet BS is a member for adjusting the color when visually recognized through the 2 nd display unit 24 and the 1 st display unit 18, and is configured to be visually recognized as black in the present embodiment. A through hole H is formed in a part of the black sheet BS, and the illuminance sensor 29 is provided in the through hole H. Therefore, the illuminance sensor 29 is configured to receive light from the front surface side in the display region of the electronic device 1, and can detect the following factors: the electronic apparatus 1 is placed under bright external light, and the illuminance of the display area becomes high; when the user operates the touch panel 17 of the electronic device 1 with a finger, the illuminance of the display area becomes low due to the finger covering.
Returning to fig. 2, the 2 nd input unit 30 is constituted by various buttons, and inputs various information in accordance with an instruction operation by the user.
The GPS antenna 31 receives radio waves transmitted from a satellite in the GPS, converts the radio waves into an electric signal, and outputs the converted electric signal (hereinafter referred to as a "GPS signal") to the GPS module 32.
The GPS module 32 detects the position (latitude, longitude, altitude) of the electronic apparatus 1 and the current time shown by the GPS based on the GPS signal input from the GPS antenna 31. In addition, the GPS module 32 outputs information indicating the detected position and the current time to the 2 nd CPU 11B.
[ functional Structure of embodiment 1 ]
Next, a functional configuration of the electronic apparatus 1 will be described.
Fig. 4 is a functional block diagram showing a functional configuration for executing the 1 st luminance control process among the functional configurations of the electronic apparatus 1 of fig. 2.
The 1 st luminance control process is a series of processes for controlling the luminance of the display screen of the 1 st display unit 18 based on the illuminance detected by the illuminance sensor 29.
When the 1 st luminance control process is executed, as shown in fig. 4, the illuminance information acquisition unit 51, the operation determination unit 52, and the luminance control unit 53 function in the 1 st CPU11A, and the sensor information acquisition unit 61 functions in the 2 nd CPU 11B.
The illuminance information acquisition unit 51 acquires the illuminance detected by the sensor information acquisition unit 61 of the 2 nd CPU 11B.
The operation determination unit 52 determines whether or not the user is performing a touch operation in the display area of the electronic apparatus 1 based on the detection result of the touch panel 17. In this case, the operation determination unit 52 detects the position where the user performs the touch operation in the display area.
The luminance control unit 53 controls the luminance of the 1 st display unit 18 based on the illuminance acquired by the illuminance information acquisition unit 51. That is, when the electronic device 1 is placed in a bright (high-illuminance) environment, the display screen becomes relatively dark, and the luminance control unit 53 controls the luminance of the 1 st display unit 18 to a high luminance corresponding to the detected illuminance in order to prevent difficulty in visual recognition. On the other hand, when the electronic apparatus 1 is placed in a dark (low-illuminance) environment, the display screen becomes excessively bright, and the luminance control unit 53 controls the luminance of the 1 st display unit 18 to a low luminance corresponding to the detected illuminance in order to prevent difficulty in visual recognition. The value of the luminance corresponding to the illuminance is held in the electronic device 1 as, for example, data in a table format or a predetermined function, and the luminance control unit 53 controls the luminance by appropriately referring to the data in the table format or the predetermined function.
The luminance control unit 53 controls the luminance of the 1 st display unit 18 based on the illuminance acquired by the illuminance information acquisition unit 51 and the determination result of the operation determination unit 52. For example, when the illuminance in the display area of the electronic device 1 is equal to or less than a preset threshold Lth, the luminance control unit 53 determines whether the user is performing a touch operation. When the user is performing a touch operation, the display area of the electronic device 1 is covered by the user's operation (finger, hand, etc.) and it is estimated that the illuminance temporarily decreases, and therefore the luminance control unit 53 does not adjust the luminance of the 1 st display unit 18 but maintains the previous luminance (for example, the luminance immediately before the touch operation is detected). On the other hand, when the user is not performing the touch operation, it is estimated that the environment of the electronic device 1 itself is dark and the illuminance is reduced, and therefore the luminance control unit 53 adjusts the luminance of the 1 st display unit 18 and reduces the luminance in accordance with the illuminance acquired by the illuminance information acquisition unit 51. Further, the threshold Lth and the like can be set by experimentally obtaining the illuminance at the time of the touch operation of the user in the display area of the 1 st display unit 18.
The sensor information acquiring unit 61 acquires detection values detected by various sensors, such as illuminance detected by an illuminance sensor.
[ operation of embodiment 1 ]
Fig. 5 is a flowchart illustrating the flow of the 1 st luminance control process executed by the electronic apparatus 1 of fig. 1 having the functional configuration of fig. 4.
The 1 st luminance control process is started at the same time when the power of the electronic apparatus 1 is turned on, and is ended when an operation to turn off the power of the electronic apparatus 1 is performed.
In step S1, the illuminance information acquisition unit 51 acquires the illuminance detected by the sensor information acquisition unit 61 of the 2 nd CPU 11B.
In step S2, the luminance control unit 53 controls the luminance of the 1 st display unit 18 based on the acquired illuminance.
In step S3, the luminance control unit 53 determines whether or not a change occurs in illuminance. In this case, for example, when the illuminance changes by a predetermined threshold value or more, it can be determined that a change has occurred in the illuminance.
If there is no change in illuminance, the determination at step S3 is no, and the process at step S3 is repeated.
On the other hand, when there is a change in illuminance, the determination is yes in step S3, and the process proceeds to step S4.
In step S4, the luminance control unit 53 determines whether or not the illuminance is equal to or less than a preset threshold Lth.
If the illuminance is not equal to or less than the preset threshold Lth, the determination is no at step S4, and the process proceeds to step S2. That is, the luminance adjustment is performed when the illuminance is higher than the illuminance assumed to be the case where the user is performing the touch operation in the display area of the 1 st display unit 18.
On the other hand, if the illuminance is equal to or less than the preset threshold Lth, the determination is yes in step S4, and the process proceeds to step S5.
In step S5, the operation determination unit 52 determines whether or not the user is performing a touch operation in the display area of the electronic apparatus 1 based on the detection result of the touch panel 17. If the user does not perform a touch operation in the display area of the electronic apparatus 1, the determination in step S5 is no, and the process proceeds to step S2. In this case, since it is estimated that the environment of the electronic apparatus 1 itself is dark, the luminance adjustment is performed.
On the other hand, when the user is performing a touch operation in the display area of the electronic apparatus 1, the determination in step S5 is yes, and the process proceeds to step S3. In this case, since the user is performing a touch operation, it is estimated that the display area of the electronic apparatus 1 is covered by the user's operation (finger, hand, or the like) and the luminance is temporarily lowered, and therefore, the luminance adjustment is not performed.
That is, the luminance control unit 53 determines the accuracy (reliability) of the information on light detected by the illuminance sensor 29 based on the detection result of the touch panel 17, and the luminance control unit 53 performs luminance adjustment when determining that the accuracy is a predetermined value or more, that is, when determining that the reliability of the information on light is high. Here, the case where the accuracy is equal to or higher than the predetermined value (the case where the reliability is high) is a case where the user does not perform the touch operation (the case where the determination in step S5 is no).
By the above processing, in the electronic device 1, the luminance of the display screen of the 1 st display unit 18 is adjusted in accordance with the illuminance in the display area, and when the illuminance in the display area is equal to or less than the preset threshold Lth, it is determined whether or not the user is performing the touch operation. When the user is performing a touch operation, it is estimated that the display area of the electronic device 1 is covered by the user's operation (finger, hand, etc.) and the illuminance temporarily decreases, and therefore the luminance of the 1 st display unit 18 is not adjusted and the previous luminance is maintained.
Therefore, in the electronic apparatus 1 in which the illuminance sensor 29 is disposed on the back side of the 1 st display unit 18, even if the user operates the touch panel 17, the luminance adjustment of the 1 st display unit 18 that is an error can be suppressed.
[ functional Structure of embodiment 2]
Fig. 6 is a functional block diagram showing a functional configuration for executing the 2 nd luminance control processing among the functional configurations of the electronic apparatus 1 of fig. 2.
The functional configuration of the electronic device 1 according to embodiment 2 will be described below with reference to fig. 6. The difference from embodiment 1 is that the 2 nd CPU11B is further provided with a transmittance control section 62. In embodiment 1, the brightness adjustment is suppressed according to the presence or absence of the operation of the touch panel, but in embodiment 2, the brightness adjustment is suppressed according to the open/close state of the liquid crystal shutter of the transmittance control unit 62.
Since the hardware configuration is the same in embodiment 1 and embodiment 2, the description thereof is omitted. In the hardware configuration and the functional configuration, the same elements as those in embodiment 1 are denoted by the same reference numerals.
The function of the sensor information acquiring unit 61 is the same as that of embodiment 1, and therefore, the description thereof is omitted.
The transmittance control unit 62 controls the transmittance of the PN liquid crystal display as the 2 nd display unit 24. As described above, the PN liquid crystal display transmits incident light at a portion to which a potential is applied, and does not transmit incident light at a portion to which no potential is applied.
The transmittance control unit 62 performs control of applying or not applying a potential to the 2 nd display unit 24 in accordance with an operation to the 2 nd input unit 30. When this input operation is performed, the layout (design) of the display content is changed, and for example, the display color, i.e., black and white, of the display content of the 2 nd display unit 24 is inverted.
When the 2 nd luminance control process is executed, as shown in fig. 6, the illuminance information acquisition unit 51, the operation determination unit 52, and the luminance control unit 53 function in the 1 st CPU11A, and the sensor information acquisition unit 61 and the transmittance control unit 62 function in the 2 nd CPU 11B.
The illuminance information acquisition unit 51 acquires the illuminance detected by the sensor information acquisition unit 61 of the 2 nd CPU 11B.
The operation determination unit 52 detects an input operation of the 2 nd input unit 30 by the user, and thereby determines which of the open state and the closed state the liquid crystal shutter is in the 2 nd display unit 24.
When the input operation of the 2 nd input unit 30 by the user is detected, the transmittance control unit 62 changes the transmittance of the PN liquid crystal display of the 2 nd display unit 24. The transmittance is, for example, a binary value of an open state (transmissive state) or a closed state (relatively non-transmissive state) of the liquid crystal shutter.
[ operation of embodiment 2]
Fig. 7 is a flowchart illustrating the flow of the 2 nd luminance control process executed by the electronic apparatus 1 of fig. 1 having the functional configuration of fig. 6.
The operations in steps S1 to S3 are the same as those in embodiment 1. That is, in step S1, the illuminance information acquisition unit 51 acquires illuminance, and in step S2, the luminance control unit 53 controls the luminance of the 1 st display unit 18 based on the acquired illuminance.
In step S3, the luminance control unit 53 determines whether or not a change occurs in illuminance. If there is no change in illuminance, the process of step S3 is repeated, and if there is a change in illuminance, the process proceeds to step S14.
In step S14, the luminance control unit 53 determines whether or not the illuminance is equal to or less than a preset 2 nd threshold Lth. If the illuminance is not equal to or less than the preset 2 nd threshold Lth in step S14, the determination is no, and the process proceeds to step S2.
Here, the 2 nd threshold Lth is, for example, an illuminance level at which the liquid crystal shutter is supposed to be in the closed state. The 2 nd threshold Lth is a value derived from measured values under a plurality of conditions, for example, and is recorded in advance at the time of shipment or the like.
That is, in step S14, it is estimated whether or not the liquid crystal shutter of the 2 nd display unit 24 is in the open state based on the illuminance acquired by the illuminance information acquisition unit 51. When the illuminance is higher than the illuminance at which the liquid crystal shutter is assumed to be closed, the luminance control unit 53 estimates that the liquid crystal shutter is open, and proceeds to step S2, where the luminance of the 1 st display unit 18 is adjusted based on the acquired illuminance.
On the other hand, if the illuminance is equal to or lower than the preset 2 nd threshold Lth, the determination is yes in step S14, and the process proceeds to step S5.
In step S15, the operation determination unit 52 determines the transmittance of the 2 nd display unit 24, that is, the open/close state of the liquid crystal shutter, based on the control of the transmittance control unit 62.
When the operation determination unit 52 determines that the liquid crystal shutter is in the open state, the determination is no in step S15, and the process proceeds to step S2. In this case, since it is estimated that the environment of the electronic apparatus 1 itself is dark, the luminance adjustment is performed.
On the other hand, when the operation determination unit 52 determines that the liquid crystal shutter is in the closed state, the determination is yes in step S15, and the process proceeds to step S16. In this case, since the liquid crystal shutter is in the closed state, it is estimated that the display area of the electronic apparatus 1 is covered by the liquid crystal shutter, and the illuminance decreases. In other words, since the liquid crystal shutter blocks a part of the incident light of the illuminance sensor, it is estimated that the illuminance is reduced. As described above, since the shutter remains in the closed state and the luminance control section 53 cannot detect the correct amount of external light according to the environment, the luminance control section 53 does not perform luminance adjustment and the process proceeds to step S16.
That is, the operation determination unit 52 determines the accuracy (reliability) of the information on light detected by the illuminance sensor 29 based on the detection result of the open/closed state of the liquid crystal shutter, and the luminance control unit 53 adjusts the luminance when it is determined that the accuracy is equal to or higher than a predetermined value, that is, when the reliability of the information on light is high.
Here, the case where the accuracy is equal to or higher than the predetermined value (the case where the reliability is high) is the case where the liquid crystal shutter is in the open state (the case where the determination in step S15 is no).
In step S16, when the operation determination unit 52 determines that the electronic apparatus 1 satisfies the predetermined condition, the process proceeds to step S17. In step S17, the transmittance controller 62 temporarily opens the liquid crystal shutter.
The predetermined condition is, for example, a case where the user makes the electronic apparatus 1 tilt, a case where the 2 nd input unit 30 receives an operation to open the liquid crystal shutter from the user, or a case where the 2 nd input unit 30 does not receive any operation for a predetermined time.
In step S17, the liquid crystal shutter is temporarily opened, and thus external light that is not blocked by the liquid crystal shutter is incident on the illuminance sensor 29. While the liquid crystal shutter is in the open state, the illuminance sensor 29 can more accurately obtain the illuminance by the external light according to the environment of the electronic apparatus 1.
[ modification 11
In embodiment 1 described above, the following are explained: when the illuminance in the display area of the electronic device 1 is equal to or lower than the threshold Lth and the operation determination unit 52 determines that the user is performing a touch operation on the display area of the electronic device 1, the luminance control unit 53 does not control the luminance of the 1 st display unit 18.
On the other hand, when the illuminance in the display area of the electronic device 1 is equal to or less than the threshold Lth, the operation determination unit 52 may determine whether or not the user is performing a touch operation on a display area (hereinafter referred to as "affected area") provided with the illuminance sensor 29 among the display areas of the electronic device 1, and when it is determined that the user is performing a touch operation on the affected area, the luminance of the 1 st display unit 18 of the luminance control unit 53 may not be controlled.
By performing such control, it is possible to more accurately detect a situation in which the display area of the electronic apparatus 1 is covered and the illuminance temporarily decreases due to the user's operation (finger, hand, or the like), and to reflect this situation in the luminance adjustment of the 1 st display unit 18.
[ modification 2]
In embodiment 1 described above, when the luminance control unit 53 controls the luminance of the 1 st display unit 18, the luminance control unit 53 may determine the amount of light emitted by the 1 st display unit 18 itself in accordance with the current display content, and execute the 1 st luminance control process after correcting the variation in the illuminance detection result due to the amount of light. That is, in the above-described embodiment, the luminance of the 1 st display unit 18 is adjusted based on the illuminance acquired by the illuminance information acquisition unit 51 and the determination result of whether or not the user is performing the touch operation, or the luminance of the 1 st display unit 18 is not adjusted and the previous luminance is maintained. In contrast, in the present modification, since the display content displayed by the 1 st display unit 18 in the region corresponding to the arrangement position of the illuminance sensor 29 is grasped in the electronic device 1, a component that influences the detection result of the illuminance sensor 29 by reflection of the irradiation light based on the display content by the user's finger or the like is estimated. Then, the change in illuminance in the display area of the 1 st display unit 18 is determined by subtracting a component of the change in illuminance based on the display content of the 1 st display unit 18 among the detected change in illuminance as a whole from the detection result of the illuminance sensor 29.
This makes it possible to adjust the luminance of the 1 st display unit 18 while suppressing the influence of the display content of the 1 st display unit 18.
The configuration of the present modification is not limited to the case of determining whether or not a finger is present on the touch panel 17 (whether or not the user is performing a touch operation) as described above. That is, every time the luminance control unit 53 controls the luminance of the 1 st display unit 18, when detecting external light, the luminance control unit 53 may always determine the light amount by the light emission of the 1 st display unit 18 itself, and control the luminance of the 1 st display unit 18 based on the detection result of subtracting the light component by the light emission of the 1 st display unit 18 itself from the illuminance detected by the illuminance sensor 29. In this way, the luminance of the 1 st display unit 18 can be adjusted based on the accurate illuminance in which the influence of the light emission of the 1 st display unit 18 itself is suppressed.
[ modification 3]
In embodiment 2 described above, the detection condition in step S16 in fig. 7 is a case where a tilt occurs, but the following case may be employed as another example.
For example, the illuminance constantly acquired by the illuminance sensor 29 may change rapidly. In this case, if the illuminance abruptly changes in step S16, the process proceeds to step S17. In step S17, the illuminance sensor 29 detects illuminance with the liquid crystal shutter open. Thus, the illuminance sensor 29 can detect accurate illuminance in response to a change in the environment.
[ modification 4]
In the above embodiment, as shown in fig. 2 and the like, the electronic device 1 may include the 1 st display unit 18 and the 2 nd display unit 24, but may not include the 1 st display unit 18. In this case, the luminance control unit 53 adjusts the luminance of the 2 nd display unit 24 based on the illuminance detected by the illuminance sensor 29.
That is, the electronic device 1 according to the present modification may be configured not to include the 1 st display unit 18, and the 2 nd display unit 24 may be configured by a liquid crystal shutter and a backlight. In this case, the illuminance sensor 29 is disposed on the rear surface of the 2 nd display unit 24 to detect information on light. When the operation determination unit 52 determines that the accuracy of the information on the light is equal to or higher than the predetermined value, that is, when the reliability of the information on the light is high, the luminance control unit 53 adjusts the luminance of the backlight of the 2 nd display unit 24.
[ modification 5]
As another modification, the 1 st display unit 18 may function not as a display unit but as a backlight. In this case, the display unit displaying the display content is the 2 nd display unit 24, and the OLED, which is the 1 st display unit 18 in the figure, functions as a backlight. In this case, the illuminance sensor 29 is disposed on the rear surface of the 2 nd display unit 24 to detect information on light. The operation determination unit 52 adjusts the luminance of the OLED when determining that the accuracy of the information on the light is equal to or higher than a predetermined value, that is, when determining that the reliability of the information on the light is high.
[ modification 6]
As another modification, when it is determined as yes in step S5 of embodiment 1, that is, when the user is operating the touch panel 17, the luminance control unit 53 may suppress the control of the luminance. In this case, the ROM12 holds in advance a decrement value of the illuminance generated when the touch panel 17 is not operated, and the decrement value is used for controlling the luminance. For example, the luminance control unit 53 adds the illuminance corresponding to the previously held decrement value to the illuminance detected in the state where the touch panel 17 is not operated, to estimate the illuminance in the state where the touch panel 17 is not operated. The luminance control unit 53 controls the luminance of the 1 st display unit 18 based on the estimated illuminance. In this manner, the luminance control section 53 can perform different controls while suppressing the normal luminance control when there is no touch operation.
[ modification 7]
As another modification, when it is determined as yes at step S16 in embodiment 2, that is, when the liquid crystal shutter is in the closed state, the luminance control unit 53 may suppress the control of the luminance. In this case, a decrement value of illuminance generated by the liquid crystal shutter being turned from the open state to the closed state is held in advance in the ROM12, and the decrement value is used for controlling the luminance. For example, the luminance control unit 53 adds the illuminance corresponding to the previously held decrement value to the illuminance detected in the closed state of the liquid crystal shutter, thereby estimating the illuminance in the open state of the liquid crystal shutter. The luminance control unit 53 controls the luminance of the 1 st display unit 18 based on the estimated illuminance. In this way, the luminance control section 53 can perform different control while suppressing normal luminance control when the liquid crystal shutter is in the open state.
The electronic device 1 configured as described above includes the 1 st display unit 18 or the 2 nd display unit 24, the illuminance sensor 29, the luminance control unit 53, and the operation determination unit 52.
The illuminance sensor 29 is disposed on the back side of the display surface of the display unit. The luminance control unit 53 controls, for example, the luminance of the 1 st display unit 18 based on the information on the light detected by the illuminance sensor 29. The operation determination section 52 determines the reliability of the information relating to light detected by the illuminance sensor 29.
When it is determined that the reliability is high, the luminance control unit 53 controls the luminance of, for example, the 1 st display unit 18, and when it is determined that the reliability is low, the luminance control unit 53 suppresses the control of the luminance of, for example, the 1 st display unit 18.
Thus, since the accuracy of the light amount detected by the illuminance sensor 29 is determined, and the luminance of the display unit is adjusted if it is determined to be reliable, appropriate luminance adjustment is performed. For example, when the illuminance detected by the illuminance sensor 29 is reduced, it is possible to determine whether the reduction in illuminance is a temporary phenomenon caused by an obstacle that blocks incident light from the illuminance sensor 29 or whether the environment of the electronic apparatus 1 is dark, and therefore it is possible to adjust the luminance of the display surface more accurately.
The electronic device 1 further includes a touch panel 17 disposed on the front surface side of the 1 st display unit 18 or the 2 nd display unit 24, the operation determination unit 52 determines whether or not the touch panel 17 is being operated by the user, the luminance control unit 53 determines that the reliability is high when the operation determination unit 52 determines that the touch panel 17 is not being operated by the user, and controls the luminance of the 1 st display unit 18, and the luminance control unit 53 determines that the reliability is low when the operation determination unit 52 determines that the touch panel 17 is being operated by the user, and suppresses the control of the luminance of the 1 st display unit 18.
This makes it possible to determine whether the illuminance is temporarily reduced or the environment of the electronic device is dark due to the operation of the touch panel 17 by the user. By determining the presence or absence of the operation of the touch panel, the illuminance sensor 29 can more accurately control the luminance of the 1 st display unit 18.
The 1 st display unit 18 of the electronic device 1 includes the 2 nd display unit 24, the luminance control unit 53 determines whether or not the liquid crystal shutter of the 2 nd display unit 24 is in the transmissive state, the luminance control unit 53 determines that the reliability is high and controls the luminance of the 1 st display unit 18 when the operation determination unit 52 determines that the liquid crystal shutter is in the transmissive state, and the luminance control unit 53 determines that the reliability is low and controls the luminance of the 1 st display unit 18 when the operation determination unit 52 determines that the liquid crystal shutter is not in the transmissive state.
This allows detection of appropriate illuminance in accordance with the transmittance of the liquid crystal shutter, that is, the open/closed state of the liquid crystal shutter. When the liquid crystal shutter is in the open state, the illuminance sensor 29 detects the illuminance, whereby the illuminance in the environment of the electronic device 1 can be detected more accurately.
The 1 st display unit 18 includes an OLED disposed on the back side of the 2 nd display unit 24, the illuminance sensor 29 is disposed on the back side of the OLED, the luminance control unit 53 determines that the reliability is high when the operation determination unit 52 determines that the liquid crystal shutter is in the transmissive state, and controls the luminance of the 1 st display unit 18, and the luminance control unit 53 determines that the reliability is low when the operation determination unit 52 determines that the liquid crystal shutter is not in the transmissive state, and controls the luminance of the OLED.
Accordingly, since the illuminance is detected when the liquid crystal shutter is in the transmissive state, the luminance of the 1 st display unit 18 can be controlled more accurately.
The operation determination unit 52 determines whether or not the user is touching the area of influence corresponding to the area where the illuminance sensor 29 is arranged among the touch panel 17.
When the operation determination unit 52 determines that the user does not touch the influence area, the luminance control unit 53 determines that the reliability is high and controls the luminance of the 1 st display unit 18, and when the operation determination unit 52 determines that the user touches the influence area, the luminance control unit 53 determines that the reliability is low and suppresses the control of the luminance of the 1 st display unit 18 by the luminance control unit 53.
This makes it possible to more accurately detect that the display area of the electronic device 1 is covered by the user's operation (finger, hand, etc.) and the temporary decrease in illuminance is detected and reflected in the luminance adjustment of the 1 st display unit 18.
When the operation determination unit 52 determines that the user is operating the touch panel 17, the luminance control unit 53 maintains the luminance of the 1 st display unit 18 at the luminance immediately before the operation of the touch panel 17 is detected.
Thus, when it is estimated that the display area of the electronic device 1 is covered by the user's operation (finger, hand, etc.) and the illuminance is temporarily reduced, the luminance of the 1 st display unit 18 can be maintained.
The 1 st display part 18 is an OLED.
Thus, in the 1 st display unit 18 including the self-luminous element, the luminance can be more appropriately adjusted by the illuminance.
The 1 st display unit 18 or the 2 nd display unit 24 to be controlled includes a backlight.
This makes it possible to adjust the luminance of the PN liquid crystal display in which the backlight is the 2 nd display unit.
The luminance control unit 53 controls the luminance of the 1 st display unit 18 based on information for correcting a fluctuation caused by the influence of the amount of light emitted from the 1 st display unit 18 itself among the information detected by the illuminance sensor 29.
This makes it possible to adjust the luminance of the 1 st display unit 18 while suppressing the influence of the display content of the 1 st display unit 18.
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within a range that can achieve the object of the present invention are also included in the present invention.
In the above-described embodiment, when the illuminance in the display area of the electronic apparatus 1 is equal to or lower than the threshold Lth and it is determined by the operation determination unit 52 that the user is performing a touch operation on the display area of the electronic apparatus 1, the luminance of the 1 st display unit 18 of the luminance control unit 53 is controlled, but the present invention is not limited thereto. For example, when the illuminance in the display area of the electronic device 1 is equal to or less than the threshold Lth and the operation determination unit 52 determines that the user is performing a touch operation on the display area of the electronic device 1, the adjustment amount of the luminance of the 1 st display unit 18 of the luminance control unit 53 may be decreased as compared with the case where the touch panel 17 is not performing a touch operation. That is, the same effects as those of the above-described embodiment can be obtained by suppressing (stopping or lowering) the adjustment of the luminance.
In the above-described embodiment, the electronic device 1 includes the 1 st display unit 18 and the 2 nd display unit 24, but the present invention is not limited to this, and the electronic device 1 may include only the 1 st display unit 18 or only the 2 nd display unit 24. In this case, the position of the illuminance sensor 29 may be on the back surface of the display unit. In the configuration including the 1 st display unit 18 and the 2 nd display unit 24, the illuminance sensor 29 may be provided between the 1 st display unit 18 and the 2 nd display unit 24.
In the above-described embodiment, the CPU11 of the electronic apparatus 1 is configured by the 1 st CPU11A and the 2 nd CPU11B, but the present invention is not limited to this, and the CPU11 may be 1CPU having both the functions of the 1 st CPU11A and the functions of the 2 nd CPU 11B.
In the above-described embodiment, the electronic device 1 to which the present invention is applied has been described by taking a digital camera watch type device (smart watch or the like) as an example, but the present invention is not particularly limited thereto.
For example, the present invention can be applied to a general electronic device having a brightness adjustment function. Specifically, for example, the present invention can be applied to a notebook personal computer, a printer, a television receiver, a video camera, a portable navigation device, a cellular phone, a smart phone, a handheld game machine, and the like.
The series of processes described above can be executed by hardware or software.
In other words, the functional configuration of fig. 4 is only an example and is not particularly limited. That is, it is sufficient that the electronic device 1 has a function that can execute the series of processes as a whole, and what functional blocks are used to realize the function is not particularly limited to the example of fig. 4.
The 1 functional block may be constituted by a single hardware, a single software, or a combination thereof.
The functional configuration in the present embodiment is realized by a processor that executes arithmetic processing, and the processor in the present embodiment may be configured by a single processor, a plurality of processors, a multi-core processor, and various processing devices, and may include a combination of these various processing devices and a processing Circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).
In the case where a series of processes is executed by software, a program constituting the software is installed from a network, a recording medium, or the like.
The computer may be a computer that is loaded into dedicated hardware. The computer may be a computer that can execute various functions by installing various programs, and may be a general-purpose personal computer, for example.
The recording medium containing such a program is not only constituted by the removable medium 41 of fig. 2 distributed separately from the apparatus main body in order to provide the program to the user, but also constituted by a recording medium or the like provided to the user in a state of being previously loaded in the apparatus main body. The removable medium 41 is, for example, a magnetic disk (including a flexible disk), an optical disk, or an opto-magnetic disk. The optical Disk is constituted by, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disk), a Blu-ray (registered trademark) Disc, and the like. The magneto-optical Disk is formed of MD (Mini-Disk) or the like. The recording medium provided to the user in a state of being incorporated in the apparatus main body in advance is configured by, for example, the ROM12 of fig. 2 in which the program is recorded, the semiconductor memory included in the storage unit 14 of fig. 2, or the like.
In addition, in the present specification, the steps describing the program recorded in the recording medium may be, of course, processes performed in time series in the order thereof, but may not necessarily be processes performed in time series, and may include processes executed in parallel or individually.
The process of step S14 in embodiment 2 is not necessarily required, and may be omitted.
While the embodiments of the present invention have been described above, these embodiments are merely illustrative and do not limit the technical scope of the present invention. The present invention can take other various embodiments, and various modifications such as omission and replacement can be made without departing from the scope of the present invention. These embodiments and modifications are included in the scope and gist of the invention described in the present specification and the like, and are included in the invention described in the scope of claims and the equivalent scope thereof.

Claims (14)

1. An electronic device is characterized by comprising:
a display unit including a liquid crystal display device;
a light detection unit disposed on a back surface side of a display surface of the display unit;
a luminance control section that controls luminance of the display section based on the information on the light detected by the light detection section; and
a determination unit for determining the reliability of the information related to the light detected by the light detection unit,
the determination unit determines whether or not a liquid crystal shutter of the liquid crystal display device is in a transmissive state,
the luminance control unit determines that the reliability is high when the determination unit determines that the liquid crystal shutter is in the transmissive state, and controls the luminance of the display unit,
the luminance control unit determines that the reliability is low and controls the luminance of the display unit to be suppressed when the determination unit determines that the liquid crystal shutter is not in the transmissive state.
2. The electronic device of claim 1,
the electronic device further includes: a touch panel section disposed on the front surface side of the display section,
the determination section determines whether or not the user is operating the touch panel section,
the luminance control unit determines that the reliability is high when the determination unit determines that the touch panel unit is not operated by the user, and controls the luminance of the display unit,
the luminance control unit determines that the reliability is low and suppresses control of the luminance of the display unit when the determination unit determines that the user is operating the touch panel unit.
3. The electronic device of claim 1,
the display unit includes an OLED disposed on a rear surface side of the liquid crystal display device,
the light detection unit is disposed on the back surface side of the OLED,
the luminance control unit determines that the reliability is high when the determination unit determines that the liquid crystal shutter is in the transmissive state, and controls the luminance of the OLED,
the luminance control unit determines that the reliability is low and controls the luminance of the OLED to be suppressed when the determination unit determines that the liquid crystal shutter is not in the transmissive state.
4. The electronic device of claim 2,
the determination unit determines whether or not a user touches an area of influence corresponding to an area where the light detection unit is disposed among the touch panel units,
the luminance control unit determines that the reliability is high when the determination unit determines that the user does not touch the influence area, and controls the luminance of the display unit of the luminance control unit,
when the determination unit determines that the user touches the influence area, the luminance control unit determines that the reliability is low, and suppresses the control of the luminance of the display unit by the luminance control unit.
5. The electronic device of claim 4,
the luminance control section maintains the luminance of the display section unchanged at the luminance immediately before the operation of the touch panel section is detected, in a case where the determination section determines that the accuracy indicating the degree of reliability is less than a given value.
6. The electronic device according to any one of claims 1 to 5,
the display unit to be controlled includes an OLED.
7. The electronic device according to any one of claims 1 to 5,
the display unit of the control object includes a backlight.
8. The electronic device according to any one of claims 1 to 5,
the luminance control unit controls the luminance of the display unit based on information in which a variation due to an influence of the amount of light emitted from the display unit itself among the information detected by the light detection unit is corrected.
9. A brightness control method is characterized in that the brightness control method is carried out by an electronic device,
the electronic device is provided with:
a display unit including a liquid crystal display device;
a light detection unit disposed on a back surface side of a display surface of the display unit;
a luminance control section for controlling luminance of the display section based on the information on the light detected by the light detection section; and
a determination unit for determining reliability of the information related to the light detected by the light detection unit,
the determination unit determines whether or not a liquid crystal shutter of the liquid crystal display device is in a transmissive state,
the luminance control unit determines that the reliability is high when the determination unit determines that the liquid crystal shutter is in the transmissive state, and controls the luminance of the display unit,
the luminance control unit determines that the reliability is low and controls the luminance of the display unit to be suppressed when the determination unit determines that the liquid crystal shutter is not in the transmissive state.
10. The luminance control method as claimed in claim 9,
the electronic device further includes: a touch panel section disposed on the front surface side of the display section,
the determination section determines whether or not the touch panel section is being operated by a user,
when it is determined that the user does not operate the touch panel section, the reliability is determined to be high, and the luminance of the display section is controlled,
when it is determined that the user is operating the touch panel portion, it is determined that the reliability is low, and the control of the luminance of the display portion is suppressed.
11. The luminance control method as claimed in claim 9,
the display unit includes an OLED disposed on a rear surface side of the liquid crystal display device,
the light detection unit is disposed on the back surface side of the OLED,
when the determination unit determines that the liquid crystal shutter is in the transmissive state, the reliability is determined to be high, and the luminance of the OLED is controlled,
when the determination unit determines that the liquid crystal shutter is not in the transmissive state, the reliability is determined to be low, and the control of the luminance of the OLED is suppressed.
12. The luminance control method as claimed in claim 10,
the determination unit determines whether or not a user touches an area of influence corresponding to an area where the light detection unit is disposed among the touch panel units,
when the determination unit determines that the user does not touch the influence area, the determination unit determines that the reliability is high, and controls the luminance of the display unit of the luminance control unit,
when the determination unit determines that the user touches the influence area, the determination unit determines that the reliability is low, and controls the luminance of the display unit by the luminance control unit.
13. The luminance control method according to claim 12,
in a case where it is determined by the determination section that the accuracy indicating the degree of reliability is less than a given value, the luminance of the display section is maintained at the luminance immediately before the operation of the touch panel section is detected.
14. A storage medium storing a program for causing a computer to realize a related function, the computer controlling an electronic apparatus having:
a display unit including a liquid crystal display device;
a light detection unit disposed on a back surface side of a display surface of the display unit;
a luminance control section for controlling luminance of the display section based on the information on the light detected by the light detection section; and
a determination unit for determining the reliability of the information related to the light detected by the light detection unit,
the program causes the computer to implement the related functions as follows:
the determination unit determines whether or not a liquid crystal shutter of the liquid crystal display device is in a transmissive state,
the luminance control unit determines that the reliability is high when the determination unit determines that the liquid crystal shutter is in the transmissive state, and controls the luminance of the display unit,
the luminance control unit determines that the reliability is low and controls the luminance of the display unit to be suppressed when the determination unit determines that the liquid crystal shutter is not in the transmissive state.
CN201880083088.4A 2017-12-21 2018-12-14 Electronic device, luminance control method, and storage medium Active CN111542870B (en)

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